De-couple random source

[Lewiscowles1986]

So even whilst running tests this often hangs my 4th series i7 processor because of java's SecureRandom implementation.

a workaround (not for production) is to seed random with less secure random data

sudo apt install rng-tools
sudo rngd -r /dev/urandom

source

This is totally unacceptable and I won't tag a 1.0 until it's fixed

[Lewiscowles1986]

Bug removed because there is no longer blocking in the random source. Not sure how this affects cryptographic and interop with other language implementations

[Lewiscowles1986]

Answer on inter-op, all implementations in all languages have similar tests, so... not really a problem